Dual-frequency oscillation circuit diagram composed of audio decoder
Source: InternetPublisher:sigma Keywords: Power supply other power circuits Updated: 2021/09/14
567 is an audio decoder, mainly used in automatic telephone systems to identify incoming telephone tones. The core of the integrated block is a high-reliability, high-precision phase-locked loop. According to the connection method and component values used in the figure, the two output signal frequencies are 1.5kHz and 4kHz respectively. As shown in the figure below:
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